Java接口实现打印机

public interface InkBox {


    
    public String getColor();
}

public class ColorBox implements InkBox {

    @Override
    public String getColor() {
        return "黑白";
    }
}

public class GrayBox implements InkBox {
    @Override
    public String getColor() {
        return "彩色";
    }
}

public interface Paper {
    public String getPaperSize();

}

public class A4 implements Paper{
    @Override
    public String getPaperSize() {
        return "A4";
    }
}

public class B5 implements Paper{
    @Override
    public String getPaperSize() {
        return "B5";
    }
}

public class PrinterTest {
    public static void main(String[] args) {
        
        InkBox colorBox = new ColorBox();
        
//        Paper A4 = new A4();
//        Printer printer = new Printer();
//        printer.print(colorBox,A4);
//        
//
//        InkBox GrayBox = new GrayBox();
//        Paper B5 = new B5();
//        printer.print(GrayBox,B5);

        Paper A4 = new B5();
        Printer printer = new Printer();
        printer.print(colorBox,A4);
        

        InkBox GrayBox = new GrayBox();
        Paper B5 = new A4();
        printer.print(GrayBox,B5);
    }
}

运行结果：